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King County · Updated August 2026

Best Water Line Replacement in Seattle, WA

Water line replacement runs a new supply line from meter to house — the permanent fix for failing galvanized, polybutylene, or repeatedly-leaking lines. Modern trenchless pull-through methods usually spare the yard.

$3,000–$10,000
Typical cost, typical replacement

Wet-side market range — get itemized quotes before work starts

Call sooner, not later, if:
  • Second or third leak on the same supply line
  • Galvanized or polybutylene line (both past their design life)
  • Chronically poor pressure from a corroded line

Top-Rated Companies for Water Line Replacement in Seattle

Companies whose focus matches this work are listed first, then Seattle's other top-rated plumbers. Same no-pay-to-play ranking as everywhere on Wetside Plumbing — the formula.

#1 · SEATTLE

The Pipe Doctor

4.5 rating · 35 Google reviews · Plumber
12345 Lake City Way NE Ste 311, Seattle, WA 98125
#2 · SEATTLE

Ben’s Plumbing & Drain Cleaning

5.0 rating · 386 Google reviews · Drainage service
1141 NW 53rd St, Seattle, WA 98107
#4 · SEATTLE

Anthony's Plumbing

5.0 rating · 282 Google reviews · Plumber
4431 SW Admiral Wy, Seattle, WA 98116
#6 · SEATTLE

Knight Rooter Sewer & Drain Cleaning Services

5.0 rating · 255 Google reviews · Plumber
10202 5th Ave NE Ste 200, Seattle, WA 98125
#9 · SEATTLE

Odyssey Plumbing

5.0 rating · 170 Google reviews · Plumber
3901 NW Leary Wy, Seattle, WA 98107

Google Business data, 2026-08-07. See the full Seattle ranking →

Also searched as: new water, new water line repair, new water service, water line repair replacement, water line repairs replacements, water main repair replacement.

Before You Call

Water Line Replacement: Common Questions

How disruptive is it?

Trenchless replacement needs two pits (at the meter and at the house) and typically finishes in a day. Open trenching is reserved for lines with too many bends or obstructions.

What pipe should the new line be?

On the wet side you'll mostly see PEX or HDPE (flexible, freeze-tolerant, trenchless-friendly) and copper where soil conditions favor it. Any of the three, properly installed and permitted, outlives your mortgage.

How do I check a company's license?

Ask for their Washington L&I contractor number and verify it at secure.lni.wa.gov/verify — active license, bond, and insurance. Listings above with a green badge are ones we've already matched to an active license in state records.

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